Question

Explain why a hydrogen bond between two water molecules is weaker than a hydrogen bond between two hydrogen fluoride molecules.

Short answer

The partially positive H and the larger partially negative F will produce a stronger hydrogen bond than the hydrogen connection formed by H and O.

Step-by-step solution

Definition of Hydrogen bond

A hydrogen bond is an electrostatic attraction between a proton in one molecule and an electronegative atom in other forms a weak link between two molecules.

Explanation of why hydrogen bond between two water molecules is weak

Because F has a higher electronegativity than O, the partial negative charge on F is bigger than that on O. As a result, the hydrogen bond created by the partially positive H and the larger partially negative F will be stronger than the hydrogen link formed by H and O.